poly·​he·​dron | \ ˌpä-lē-ˈhē-drən How to pronounce polyhedron (audio) \
plural polyhedrons or polyhedra\ ˌpä-​lē-​ˈhē-​drə How to pronounce polyhedron (audio) \

Definition of polyhedron

: a solid formed by plane faces

Illustration of polyhedron

Illustration of polyhedron

Other Words from polyhedron

polyhedral \ ˌpä-​lē-​ˈhē-​drəl How to pronounce polyhedron (audio) \ adjective

Examples of polyhedron in a Sentence

Recent Examples on the Web Euler implicitly assumed his polyhedra were convex, meaning a line segment joining any two points stayed completely within the polyhedron. quantamagazine.org, 26 Jan. 2021 This polyhedron is a classic prism made from professional-grade optical crystal glass. Popular Science, 23 Oct. 2019 The 20th-century mathematician Aleksandr Aleksandrov proved that for every two-dimensional polygon, there is one unique way of folding it to form a 3-D polyhedron. Quanta Magazine, 5 Jan. 2017 And the circle packing proof tells you that there’s a polyhedron that has all its edges tangent to a sphere. Quanta Magazine, 19 Mar. 2018 The printer cranks out up to 150 polyhedra each year – everything from models of protein crystallography to Mars' topography. Stacey Smith Lang, WIRED, 1 Nov. 2001

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'polyhedron.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of polyhedron

1570, in the meaning defined above

History and Etymology for polyhedron

New Latin

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Time Traveler for polyhedron

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The first known use of polyhedron was in 1570

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Cite this Entry

“Polyhedron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polyhedron. Accessed 14 Aug. 2022.

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More from Merriam-Webster on polyhedron

Britannica.com: Encyclopedia article about polyhedron


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